Valve-gear.



P. J. COLE.

VALVE GEAR.

APPLICATION FILED IEB.24, 191s.

Patented 0013.21, 1913.

2 BHEETSSHEET 1.

-FIG-1 WITNESSES EMW I P. J. 00m;

VALVE GEAR.

APPLICATION FILED FEB. 24, 1913.

1,076,099, Patented 001;. 21, 1913.

2 SHEBT8SHEET 2.

mum-mum:

UNITED STATES PATENT curios.

rnANcIscom, or scnnNno'mnY, new man.

VALVE-GEAR Speciflcation of Letters Batent.

-- Patented oeeai, 1913,

Application filed February 24, 1913. Serial Kc. 750,127.

To all whom it may condom:

Be it known that I, FRANCIS J. Conn, of

Schenectady, in the county of, Schenectady and St-ate of New York, have'invented a certain new and useful Improvement in Valve-Gears, of which improvement the following is a specification.

My invention relates to locomotive engine valve gears of the well known Walschaert type, and its object is to provide means whereby the motion of a steam distribution valveactuated by valve gear of such type .may be accelerated toward the ends of its traverse in each direction, thereby resulting in prolonging the expansion and decreasing the compression of the steam as well as some-- what increasing the. port open1ng.'

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings: Figure 1' is a side view, partly in section, of so much of a locomotive engine as illustrates an application of my invention; Fig. 2, a similar view, partly in vertical longitudinal section and on an enlarged scale, of my improved valve gear; Fig. 3, arear view, partly in vertical transverse section, of the same; Fig.

4, a plan or top view; and, Fi 5, a *hori-.

end of a radius rod, 6, the opposite end of which is fitted to traverse in the slot of the link, 11. Thedistributi'on valve stem, 3,.is connected to an inside admission distribution valve, 3, and is, as usual, actuated by the combination lever, 4. The novel construction and connection of said lever withv the valve stem, and radius rod, by which the results of my invention are attained, will now be described.

In the practice of my invention, the-cone bination lever, 4, in lieu of being, as heretofore, positively connected to, and suspended" on, the valve stem, is suspended, by a pair of links, 12, located on its opposite sides, from a support, 1, fixed to the valve chest,

2, the upper ends of said links being journaled on'pins, 12, fixed in the support, 1,

and their lower ends being coupled to the combination-lever by-a pin, 12. The upper end of the combination lever is coupled to the radius rod by'a pin, 6", and a longitudi nal slot,-4, is formed in the combination. I

lever, below said pin, in which slot a block or die, 13, is fitted truly. The die, 13, is coupled to thecross head, 7, of the valve the combination lever, with thecapacity of independent relativemovement of the latter.

Under the construction abovedescribed, the distance between the centers of'the pin connecting the radius rod with the combination lever, and of the valve stem is variable, I

being least at the center of the valve travel,

and greatestat 'theends'. In operation, the

effect of this construction ,is to accelerate the motion of the distribution valve at the ends. of its traverse, giving a quickerfmo-f tion and exerting a marked influence on the valve events in prolonging the expansion,-

decrea-sing the compression and somewhat,

increasing the port opening. The. characteristiccomparatively sharp. endedellipse pro- .duced by "the Walschaert and-analogous valve gears may'be changed by so proportionin' the parts as to enable the events-of out o expansion, release compression, port opening, etc., to be controlled as may be best suited for different classes of service.

I claim as my invention and desire to secure by Letters Patent:-

L'The combination, in a locomotive engine valve gear of the Walschaert type,"of

a distribution valve stem, and intermediate connections coupling said valve stem to the combination lever of the valve gear'be-' low the connection of the radius rod to said lever, with the capacity of movement of said lever transversely to that of the valve stem; 2. The combination, in a locomotive engine valve gear, of a link for reversingfand changing the point of cut-oil", an eccentric rod coupled to and vibrating said link, a radius rod movable in said link, a combinationlever coupled at one end to said rod, a combination link coupling the o posite end of said leverto a cross head, a istribution valve stem coupled to the'combination lever,

between the connections of the radius rod 7 and the combination link thereto, and means for permitting movement of the combination lever transversely to that ofthe valve stem.

. 65 stem, by a pin,-13, the valve stem and distribution valve being thereby reciprocated byv 3. The combination, in a. locomotive engine valve gear, of a pivoted link, on eccentric rod coupled thereto, a, radius rod lifted to traverse in the link, a longitudinally 5 slotted combination lever coupled to the mdius rod, links suspending said combination lever from a fixed support, a distribution emme valve stem, and a (lie fitting the slot of the combination lever and coupled to the distribution valve stem.

- FRANCIS J. COLE.

Witnesses:

FRANK F. Scovmn, S. W. TYLER. 

